| Date | IP Address |
| 2023-08-04 | 54.212.125.192 (ClassC) |
| 2024-06-30 | 44.242.86.96 (ClassC) |
| 2024-10-02 | 34.211.61.109 (ClassC) |
| 2024-10-04 | 44.224.0.234 (ClassC) |
| 2024-11-10 | 44.224.237.157 (ClassC) |
| 2024-11-26 | 35.161.123.187 (ClassC) |
| 2025-01-12 | 35.160.165.110 (ClassC) |
| 2025-01-18 | 54.200.48.241 (ClassC) |
| 2025-03-10 | 44.228.133.133 (ClassC) |
| 2025-03-15 | 35.167.239.91 (ClassC) |
| 2025-03-21 | 52.35.134.86 (ClassC) |
| 2025-04-26 | 52.11.27.165 (ClassC) |
| 2025-08-23 | 34.217.237.6 (ClassC) |
| 2025-11-23 | 54.201.36.100 (ClassC) |
| 2026-02-07 | 44.225.119.73 (ClassC) |
| Date | Domain | IP |
| it-notif1.postofficeweb.com | 2025-05-16 | 35.167.237.67 |
| it-notif2.postofficeweb.com | 2025-05-17 | 44.226.124.2 |
| ssl.postofficeweb.com | 2025-05-13 | 44.226.124.2 |
| acir.postofficeweb.com | 2023-08-04 | 54.212.125.192 |
| rnicrosoft.postofficeweb.com | 2025-05-10 | 52.40.20.182 |
| www.postofficeweb.com | 2023-08-09 | 52.36.111.89 |
| delivery.postofficeweb.com | 2025-07-13 | 35.164.28.101 |